Chair-adjustment.



PATENTED GUTES, 1903.

H. W. BwOLENSS'.. CHAIR ADJUSIMENT.

APPLIGATION FILED; MAR.. 1902.

2 SHEETS-SHEET 1.

N0 MODEL.

No. 740,619. PATENTED 00T. 6, 19os.

H. w. BOLENS. CHAIR ADJUSTMBNQQ. v AEPLIUATION FILED MAR. '1. 1902,

2 SHEETS-SHEET 2.

.section on the line 5 5 of Fig. 2.

ein. '140,6'1e. l

' UNITED STATES atented October 6, 1903:

PATENT OFFICE.

` GH-AIR' AJUSTMNT'- SPECIFATI forming part of Letters Patent -o. 740,619, dated October 6,-

Applcation filed March 7 1902. lSerial No. 97,059. (No model.)

To @ZZ whom it may concern:-

' Be it known that I, HARRY W. BoLENs, a citizen of the United States, residing at Port Washington, in the county of Ozaukee and State of Wisconsin, have invented new and useful Improvements in Chair Adjustments, of which the following is a specification;

This invention relates to improvements in chair adjustments, the objects being to produce an adjustment whereby" the seat may be vertically raised and lowered and freely revolved without disturbing such adjustment, and this, too, independ ent of any tilting action thereof. l

Other obj ects and advantages of the invention will hereinafter appear, and the novel features thereof will be particularly pointed out in the claim.

Referring to the drawings, Figure 1 is a side elevation of a chair adjustment embodying my invention. Fig. 2 is a vertical transverse central section thereof. Fig. 3 is a transverse horizontal section on the'line 3 3 ol Fig. 1. the sleeve and post.

Fig. il is asimilar view throughV Fig. 5 is a transverse Fig. 6 is a detail perspective view of the sleeve.

Similar reference-numerals refer tosimilar parts throughout the drawings.

rl`he socket 1 is preferably polygonal externally and formed with the usual'recesses for the reception of the chair base orlegs, screws being passed downwardly through the upper walls of the recesses and 'into the legs for securing them in position. The socket is centrally and longitudinally bored, as at 2F,

throughout its length, and the said bore is surrounded at its upper end by an annular superficial bearingrib 3. The socket, fur-v thermore, may be provided with a radiallyr-v disposed threaded aperture et for the reception of a retaining-screw 5.

Fittingaccurately yet rotatably within -the bore of the socket is a cylindrical sleeve 6, the same having formedbetween its ends an external annular groove '7, coincident with the retaining-screw 5, by which latter, as will be obvious, the sleeve may be held against vertical removal .yet free to rotate. The sleeve preferably agrees in length with that of the socket l in order to give the former a suitable length of bearing in the latter.

At its upperend, above the socket 1, the

sleeve is provided or formed integral with an annular boss 8, also tubular and interiorly forming a continuation of the internal bore`9 of the sleeve. This boss may be flared at its lower end, as at 10, to form a bearing surface or track 11, which may Vrest either directly on the annular bearing-rib 3, as shown herein, or said rib and track may have their surfaces so formed as to adapt them to receiveantifriction devices-such, for instance, as a scries of balls.

At diametrically opposite-points there rises from the annularv boss 8 aA pair of studs 12, having inwardly-disposed lugs'12a at their upper ends, and between the studs there pro# jects inwardly into the bore of the boss a ra= dial stud 13. p

The seat-post or screw 14 is of a diameter adapting it to accurately t the bore of the sleeve and boss and may be provided through;

out its length with a groove or channel 15, that receives the radial pin or stud 13, by means of which latter the said seat-post is prevented from rotation independent of the sleeve, while at the same time it is free to move longitudirnally.

Threaded on the seat-post is a hub 16, the same' being annularly grooved externally, as at 17, so as to be rotatably mounted between the pairof opposite inverted studs 12, the in= wardly-tending ends or lugs 12a of the said studs engaging the annular groove of the hub. The external diaineterof the hub is such as will readily .permit its lateral insertion between'the studs, and of course when in position and the seat-post or screw extending into the sleeve said hub cannot be removed,

yet is capable of revolving.

The hub may be provided with or formed as apart of a small hand-wheel 1S, by which vsaid hub may be conveniently rotated.

It will of course be understood that the upper end of the seat-post or screw may be pro-f vided with anV ordinary securing-plate, by which it may be secured to the chair-seat or to any suitable chair-spider, whereby inthe latter instance the cha-ir will be capable of tilting.

Y The seat-post and its sleeve being locked together by the stud 13, the two are free to rotate together, the hub and its wheel movi ing therewith. Hen ce it Will be obvio-u s that the rotations given the chair-seat and its post will not in any Way affect or alter the vertical adjustment of the seat. 'To secure the latter adjustment, it is simply necessary to rotate the hub, in the present instance through the instrumentality of the hand- Wheel 18, and the latter being confined against vertical movement will cause the seat-post or screw to be fed vertically, either up or down, in accordance With the direction of rotation ofthe Wheel.

The numerous advantages arising from this construction will at once be obvious in that a chair thus provided may be freely rotated and yet its vertical adjustment remain undisturbeda most desirable feature-and yet,

on the other hand,the seat may be readily vertically adjusted to suit the occupant. Furthermore and finally, this construction may be employed in connection With any of the Well-known styles and constructions of chairspiders.

Having described my invention, What I claim as new, and desire to secure by Letters Patent, is-

The combination, in a chair adjustment, of a socket annularly bored and provided with a radial aperture, a bored sleeve circumferentially grooved vand mounted in the'socket, a pair of vertical studs rising from the upper end of the sleeve, and provided with inwardly disposed lugs, a hub annularly grooved to receive the lugs and freely rotatable therebetween, a seat-post threaded in the nut and extending into the sleeve and provided With a longitudinal groove and pins projecting through the casting into the annular groove of the socket andthrough the sleeve into the longitudinal groove of the seat-post.

In testimony whereof I affix my signature in presence of two Witnesses.

HARRY XV. BOLENS.

Vitnesses: ALBERT D. BoLENs, T. A. BOERNER. 

